To take a screenshot of an issue on your computer, Windows has a handy tool built in called the Snipping Tool.
To launch the Snipping Tool, search for “Snipping Tool” in the Start menu and launch it.
This will open the Snipping Tool
Click the “New” button to start capturing
Then click and drag a rectangle over the area you wish to take a picture of.
You will be returned to the Snipping tool window.
The image area you captured will be copied to your clipboard.
You can then open an email and paste the screenshot into the body of an email. (Either right-click and choose paste, or press Control+V on the keyboard)